(2014·山东省实验中学一模)—Have you graduated from Shandong University?—Yes.I________there for 4 years.
#99148
A
studied 
B
have studied
C
had studied 
D
have been studying
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——Can you give me some advice on what I said just now?—— Sorry, my mind ______ .
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A
has wondered
B
had wondered
C
is wondering
D
was wondering
What can you suppose they___________ this time next year?
#103247
A
are doing
B
will do
C
will have been done
D
will be doing